When your Vizio TV stops sending sound over eARC or ARC from built-in TV apps, it's usually caused by a corrupted HDMI-CEC handshake between your TV and soundbar or receiver. HDMI-CEC, eARC, and app updates interact in unpredictable ways, so even small changes can break the audio connection.
Quick answer
- Power cycle both devices and unplug the HDMI cable during the reset
- Reconnect the HDMI cable to the correct eARC/ARC port
- Turn on the TV first, then the soundbar or receiver
- Toggle HDMI-CEC and ARC settings off and back on in both device menus
- Test with multiple streaming apps to confirm the fix
Symptoms
- Built-in TV apps play video but produce no sound through your soundbar or receiver
- Soundbar display shows "TV Audio" but audio cuts in and out or stays silent
- eARC worked previously but stopped after a TV update or power outage
- External devices (streaming sticks, game consoles) still send audio properly through eARC
- TV speakers work fine, but switching to external audio produces silence
Quick checks
- Confirm the HDMI connection — Make sure the HDMI cable connects to the ARC or eARC-labeled port on your TV (usually only one specific port supports this)
- Use a certified high-speed cable — Old or damaged HDMI cables cause frequent eARC dropouts, so swap in a known-good certified cable
- Set TV audio output correctly — In TV sound settings, select the option that sends audio to your soundbar or receiver instead of TV speakers
- Check receiver input and volume — Verify your soundbar or receiver is set to the correct HDMI input and isn't muted
Step-by-step fix
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Power everything off completely — Turn off both the TV and your soundbar or receiver, then unplug both devices from power for 60 seconds to clear the HDMI control state
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Disconnect the HDMI cable — Unplug the HDMI cable between the TV's eARC/ARC port and your soundbar or receiver while both devices are powered off
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Reconnect the HDMI cable firmly — Plug the cable back into the eARC/ARC port on your TV and the ARC-enabled input on your soundbar or receiver (avoid adapters or wall plates for testing)
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Power on in the correct order — Turn on the TV first and let it fully boot to the home screen, then power on your soundbar or receiver (HDMI-CEC systems are sensitive to startup sequence)
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Test with a streaming app — Open Netflix, YouTube, or another built-in app and play a video, watching your receiver's display for Dolby Digital, Dolby Atmos, or PCM indicators
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Reset HDMI-CEC and ARC settings — On both devices, go to Settings → HDMI or Audio settings and toggle HDMI-CEC and ARC/eARC off, wait 10 seconds, then turn them back on
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Adjust audio format settings — If you still get silence, try changing your TV's audio output from PCM to "Auto" or "Dolby Digital" in Settings → Audio → Digital Output
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Disable competing audio outputs — Turn off Bluetooth audio if your TV is paired with headphones or speakers that might be stealing the audio signal
If it still isn't working
Simplify your setup by disconnecting all other HDMI devices from both your TV and receiver, then repeat the power cycle process with just the TV and audio device connected.
Test external sources — Connect a streaming stick or Blu-ray player to your receiver and see if eARC works from those devices. If external sources work but built-in apps don't, update your TV's firmware.
Document the exact behavior for support — Note your TV model, which HDMI port you're using, what your receiver's display shows, and which specific apps fail. This information helps manufacturers troubleshoot much faster than vague "no sound" reports.
Consider professional help if the issue persists across multiple cables, apps, and reset attempts, especially if you're seeing HDMI problems with other devices too.
FAQ
Why does eARC work with my streaming stick but not built-in TV apps? Built-in apps use different audio pathways than external HDMI devices. The TV's internal audio processing may have different format settings or a corrupted audio driver that needs a firmware update.
My receiver shows "TV Audio" but there's still no sound. What's wrong? This usually means the HDMI-CEC handshake partially worked but the audio format negotiation failed. Try changing your TV's digital audio output format from PCM to Dolby Digital or Auto.
Do I need a special HDMI cable for eARC? eARC requires an Ultra High Speed HDMI cable for full functionality, while regular ARC works with High Speed HDMI cables. Using an older cable can cause intermittent dropouts and format compatibility issues.
Should I turn HDMI-CEC off completely if I keep having problems? HDMI-CEC enables convenient features like automatic input switching and volume control, so try the reset process first. Only disable it permanently if you continue having frequent audio dropouts after trying certified cables and firmware updates.